-LRB- CNN -RRB- -- A controversial Kansas church says members will picket before the memorial service Wednesday evening for two Florida teenagers allegedly killed by their mother .

In a press release , Westboro Baptist Church of Topeka , Kansas , said it will demonstrate outside the service in Tampa because the mother is a military wife and `` the doomed American military declared war on God & His church . ''

The controversial church and its pastor , Fred Phelps , have made their name picketing near funerals of people who died of AIDS , gay people and soldiers . The church plans to picket beginning at 5:15 p.m.and ending at 6 p.m. , when the service is scheduled to start , according to CNN affiliate WFTS-TV in Tampa .

Julie K. Schenecker , 50 , is charged with two counts of first-degree murder in the shooting deaths Friday of her 16-year-old daughter , Calyx , and her 13-year-old son , Beau . She was denied bail at a court appearance Monday , a court spokesman said .

Her husband , Army Col. Parker Schenecker , is with the U.S. Central Command , which is headquartered in Tampa . Police told WFTS that he was in the Persian Gulf emirate of Qatar when his children were killed .

King High School , which Calyx attended , and Liberty Middle School , where Beau was a student , are sponsoring the service at First Baptist Church of Temple Terrace in Tampa , the church said .

Josh Saliba , director of creative ministries , told CNN he would not comment on Westboro Baptist 's plans to protest .

On Monday -- their first day back since the shootings became public -- students at Liberty Middle School wore blue and black in memory of Beau , who was an eighth-grader there .

CNN affiliate Bay News 9 posted a statement Monday from the Schenecker family :

`` Colonel Parker Schenecker has returned from his deployment and is grieving with family and friends . He is devoted first and foremost to honoring the lives and memory of his beautiful children , Calyx and Beau , '' the statement said . `` Parker and his family have been touched by the overwhelming support from the community both near and abroad . Arrangements and details are still being finalized with regard to the services to be held for Calyx and Beau . ''

A search warrant filed Tuesday said Julie Schenecker was unconscious and wearing a bloody robe , and her slain children were covered in blankets when police arrived .

Julie Schenecker was awakened and taken from a screened-in pool area to inside the home , where evidence was recovered , according to the warrant filed in Circuit Court in Hillsborough County .

The search warrant was posted on the website of CNN affiliate WTSP .

The warrant provides new details in the case : Five bullets , along with a Smith & Wesson box and instruction manual , were found in the master bedroom ; 15 live rounds and five spent shell casings were in the master bath . Also indicated in the search warrant -- both inside and outside the house -- were cigarette butts , note pads , undisclosed medication and paperwork .

Police found Calyx 's body in an upstairs bedroom . She had been shot twice in the head , police said . Beau 's body was later found in the front seat of an SUV inside the home 's garage , police said . They said he was shot while he was being driven to soccer practice .

Schenecker confessed to killing the children , according to a police statement , eventually recounting her rationale and thought process `` in detail , '' according to a news release .

`` She did tell us that they talked back , that they were mouthy , '' Tampa police spokeswoman Laura McElroy told CNN affiliate WTSP last week . `` But I do n't think that will ever serve as an explanation to the rest of us of how you could take a child 's life . ''

Schenecker had initially planned what she called the `` massacre '' -- killing the children and then herself , McElroy said on Monday -- for January 22 , but she put it off after learning there would be a three-day check before she could buy a gun .

Police later found writings in the house , thought to be from Schenecker , in which she spelled out her intentions in detail .

`` There are definitely indications that she planned this , '' McElroy said . '' -LRB- The writing -RRB- was devoid of emotion . ''

CNN 's Phil Gast contributed to this report

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Westboro Baptist Church says it will picket service because mother is a military wife

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Tampa schools sponsoring service for brother and sister , who were slain last Friday

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Julie K. Schenecker , 50 , is charged with murder in the deaths of her children

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Her husband is with the U.S. Central Command